These symptoms describe what I often see as baby getting hi volumes of foremilk
and lo hindmilk because of very frequent but relatively short feeds.  Stools
often become greenish. Tummy is 'windy'.  Baby is cranky.  The first sound at
the 2am call is that of mom & baby crying in unison.  To increase the hindmilk,
I usually have mom follow a 3 hour alternating routine.  Every feed for a given
3 hour period is on one breast.  Every feed for the next 3 hrs on the other
breast.  This also cuts down on oversupply, drowning & gagging.  Once symptoms
pass, mom can return to offering both breasts at a feed if baby wants.
It is always a good idea to test the family's problems w/cow's milk by
eliminating it for 7 to 10 days.  That's often very difficult to do in the US.
In my experience, when mom does this, she realizes the headache she has been
having 2 - 3 times a week is gone.  And she thought it was stress!  Maybe so,
but more likely a food intolerance she was unaware of until her baby's immature
system reacted to it.  Again, I warn mom not to assume what her neighbor can or
can't eat applies to her.  She is better off looking at her own family - and
baby's dad's family.  She may even have to go back to grandparents &
great-grandparents.  A family medical history is so revealing & interesting!
Phyllis Adamson, IBCLC